Reading local files/directories with html5 filesystem api

问题

I was wondering if it's possible to read the content of a local directory, for instance C:\temp, using the html5 filesystem api or is it only possible access files/directories in the "sandboxed area"?

回答1:

The HTML5 file system is designed solely for sandboxed file storage, so no, you cannot use it to access files on the user's non-sandboxed file system.

回答2:

There is the drag and drop method example at MDN which works to display the file or folder name. If it's a directory, it lists the files in the directory and subdirectories.

This works on my local web server, at this MDN page, and in this fiddle - but isn't working in the snippet below except to display the file/folder name...

let dropzone = document.getElementById("dropzone");
let listing = document.getElementById("listing");
//handle files dropped in
function scanFiles(item, container) {
  let elem = document.createElement("li");
  elem.innerHTML = item.name;
  container.appendChild(elem);
 
 if (item.isDirectory) {
    let directoryReader = item.createReader();
    let directoryContainer = document.createElement("ul");
    container.appendChild(directoryContainer);
    directoryReader.readEntries(function(entries) {
        entries.forEach(function(entry) {
          scanFiles(entry, directoryContainer);
      });
    });
  }
}
//prevent default dragover behavior
dropzone.addEventListener("dragover", function(event) {
    event.preventDefault();
}, false);
//handle the drop event
dropzone.addEventListener("drop", function(event) {
  let items = event.dataTransfer.items;

  event.preventDefault();
  listing.innerHTML = "";
 
  for (let i=0; i<items.length; i++) {
    let item = items[i].webkitGetAsEntry();
    
    if (item) {
        scanFiles(item, listing);
    }
  }
}, false);

#dropzone {
  text-align: center;
  width: 300px;
  height: 100px;
  margin: 10px;
  padding: 10px;
  border: 4px dashed red;
  border-radius: 10px;
}

#boxtitle {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  color: black;
  font: bold 2em "Arial", sans-serif;
  width: 300px;
  height: 100px;
}

body {
  font: 14px "Arial", sans-serif;
}

<p>Drag files and/or directories to the box below!</p>

<div id="dropzone">
  <div id="boxtitle">
    Drop Files Here
  </div>
</div>

<h2>Directory tree:</h2>

<ul id="listing">
</ul>

https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryReader/readEntries#Example

来源：https://stackoverflow.com/questions/17243930/reading-local-files-directories-with-html5-filesystem-api

标签

html5

html5-filesystem